CN102185432B - Method for realizing insulation around a conductive bar - Google Patents
Method for realizing insulation around a conductive bar Download PDFInfo
- Publication number
- CN102185432B CN102185432B CN201010625011.0A CN201010625011A CN102185432B CN 102185432 B CN102185432 B CN 102185432B CN 201010625011 A CN201010625011 A CN 201010625011A CN 102185432 B CN102185432 B CN 102185432B
- Authority
- CN
- China
- Prior art keywords
- tape
- contact rod
- impregnated
- insulating tape
- impregnating resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 49
- 238000009413 insulation Methods 0.000 title abstract description 10
- 229920005989 resin Polymers 0.000 claims abstract description 33
- 239000011347 resin Substances 0.000 claims abstract description 33
- 239000010445 mica Substances 0.000 claims description 30
- 229910052618 mica group Inorganic materials 0.000 claims description 30
- 238000007598 dipping method Methods 0.000 claims description 20
- 230000008569 process Effects 0.000 claims description 13
- 239000000945 filler Substances 0.000 claims description 11
- 239000012212 insulator Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 5
- 239000000758 substrate Substances 0.000 claims description 5
- 238000005470 impregnation Methods 0.000 claims description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241001251094 Formica Species 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004843 novolac epoxy resin Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49009—Dynamoelectric machine
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49009—Dynamoelectric machine
- Y10T29/49012—Rotor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49227—Insulator making
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Insulating Bodies (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
A method for insulating (5) a conductive bar (1) includes wrapping an insulating tape (2) around the conductive bar (1), enclosing it in a flexible container (4), applying a vacuum, impregnating the insulating tape (2) with an impregnating resin, curing the impregnating resin, and removing the conductive bar (1) with the insulation (5) around it from the flexible container (4). In addition, together with the insulating tape (2), an impregnating tape (3) made of the impregnating resin is wrapped around the conductive bar (1). In order to impregnate, the impregnating tape (3) is melted.
Description
Technical field
The present invention relates to a kind of method for realizing the insulator around contact rod.
Particularly, the present invention relates to the contact rod (Roebel bar (Roebel bars)) be made up of the interweaving conductive wire harness being wound with insulation mica tape around, it is used in the high-voltage large motor of such as high-rating generator.
Background technology
The stator bar of high-rating generator has the contact rod (base material rod (green bar)) be made up of multiple intertexture conductor, and each conductor is provided with insulating barrier.
Contact rod or base material rod are provided with the primary insulation body being wrapped it.
This primary insulation body is by by one deck or be typically wrapped contact rod more than the mica tape of one deck and make.
So utilize resin-dipping mica tape, then make resin solidification, thus realize around contact rod closely and the insulator of rigidity.
Usually, in order to flood mica tape, use many resin treatment or VPI process; These process are briefly described hereinafter.
Many resin treatment
According to many resin treatment, use and there is the mica tape that substrate layer and pre-preg have the mica layer of a large amount of B rank impregnating resins.
Particularly, first mica tape is wrapped contact rod, then to its extruding, thus by the excessive B rank impregnating resin that is included in mica tape from wherein discharging.
So B b stage resin b is solidified, thus B b stage resin b is transformed to the A b stage resin b with required machinery and electric property.
Many resin treatment are proved has these shortcomings:
-very expensive for the pre-preg mica tape of many resin-dippings, the contact rod therefore with the mica tape of dipping is like this also very expensive;
The container that-needs are separated, for heating pre-preg mica tape and making resin solidification;
-owing to some spaces before impregnation being closed by adhesive tape, so fill gaps is not optimum.
VPI process
In VPI processing procedure (or its equivalent way TVPI; Hereinafter will be referred to as yPI), use the mica tape (there is the resin of minimum, for mica and substrate layer being bonded together) only with substrate layer and mica layer.
In the fabrication process, mica tape is wrapped contact rod, realizes one or typically more than one mica belt.
Then, the contact rod with the dry mica tape being wrapped it is introduced the tank applying vacuum, thus all gas (such as air) is extracted out from mica tape; Then under stress impregnating resin is introduced this tank, to flood mica tape.
VPI process also has many shortcomings; Specifically:
-VPI process needs very expensive compression resistanted container;
-dipping depends on the permeability of mica tape; Usually very thick mica tape is difficult to impregnated;
If-mica tape comprises filler, then hinder dipping further, and in addition, in dipping process, this filler can be removed.
Summary of the invention
Therefore technical purpose of the present invention is to provide a kind of method, is eliminated the described problem of prior art by the method.
In the scope of this technical purpose, one aspect of the present invention is to provide a kind of than traditional many resins and the cheap method of VPI method.
Another aspect of the present invention is to provide a kind of method, and it is very thick and also allow optimum dipping when comprising filler at the mica tape being wrapped contact rod.
Another aspect of the invention is to provide a kind of method, realizes fill gaps at a high speed by the method, and prevents from or reduce filler at least largely removing in dipping process.
According to the present invention, reach this technical purpose and these and other aspects by the method provided according to claims.
Accompanying drawing explanation
From insulation mica tape preferably but the description of not exclusive execution mode and more will understand further feature and advantage of the present invention according to method of the present invention, illustrate by way of non-limiting example in the accompanying drawings, wherein:
Fig. 1-6 shows the different phase of the method in embodiments of the present invention;
Fig. 3 a and 4a shows the further stage of the method for Fig. 1-6; And
Fig. 7 and 8 shows the different execution mode of two kinds of mica tape and the impregnated tape being wrapped contact rod.
Embodiment
With reference to accompanying drawing, these figures show the method for realizing the insulator around contact rod.
Contact rod 1 is the stator bar of large-size machine, and therefore has multiple interweaving conductive wire harness (Roebel bar); Figures only show a part for line rod.
The method comprises and typically with the overlap of 50%, insulating tape 2 is wrapped in (Fig. 1) around contact rod.
Insulating tape is the mica tape be made up of the mica paper being bonded to substrate layer; Such as can use typically for the mica tape of VPI or TVPI process.
In addition, also the impregnated tape 3 be made up of impregnating resin is wrapped in (Fig. 2) around contact rod 1 together with insulating tape 2.
Impregnated tape 3 comprises the B rank impregnating resin of such as bisphenol A epoxide resin or novolac epoxy resin, and preferably it is also provided with the support material of such as carbon fibre web, to increase its mechanical performance.The degree of overlapping of impregnated tape can be selected according to required impregnating resin amount.
Insulating tape 2 and impregnated tape 3 are wrapped in around contact rod 1, make alternately to be formed at least one deck impregnated tape and at least one deck insulating tape.
In this respect, Fig. 7 shows an embodiment, wherein one deck insulating tape 2 and one deck impregnated tape 3 is alternately wrapped in around contact rod 1.
In addition, Fig. 7 also show the internal layer directly contacted with contact rod 1 and is made up of impregnated tape 3; On the contrary, outer (around it no longer last one deck of the winding layer) is made up of insulating tape 2.
Fig. 8 shows another embodiment, wherein multilayer insulation band 2 and one deck impregnated tape 3 is alternately wrapped contact rod 1.
In addition in this embodiment, internal layer is made up of impregnated tape 3, and skin is made up of insulating tape 2.
Naturally, in different embodiments, internal layer also can be made up of insulating tape, and skin can be made up of impregnated tape.
Then, the contact rod 1 with the insulating tape 2 and impregnated tape 3 being wrapped it is encapsulated in flexible container 4 (Fig. 3).
Flexible container 4 have with at US 6,840, the feature that the flexible container described in 749 is identical.
So applying vacuum, thus the gas comprised in flexible container and specifically insulating tape is extracted out, to realize high-quality dipping.
Particularly, when apply vacuum and gas bleeding time, in flexible container 4, reach the pressure between 0.1-10mbar.
So by impregnating resin varnished insulation band 2; In this respect, the impregnated tape 3 be wound around together with insulating tape 2 is melted (Fig. 4), thus make impregnating resin move towards insulating tape 2 and be flooded.
Then, make impregnating resin solidify (Fig. 5), and the contact rod 1 had around its insulator 5 is removed (Fig. 6) from flexible container 4.
In the too early stage, not starting the solidification (Fig. 4) of impregnating resin in order to make impregnated tape melt, impregnated tape 3 being heated to the first temperature of the curing temperature lower than impregnating resin.
Fig. 3 a shows can after being inserted in flexible container 4 by the contact rod 1 with the insulating tape 2 and impregnated tape 3 being wrapped it and the possible shaping stage performed before impregnation.
Realize by extruding being shaped; Such as by the every side of metallic plate 6 against contact rod 1 (there is insulating tape 2 and impregnated tape 3).
After pressing, one or more metallic plate 6 can be removed from contact rod 1, and flexible container 4 can be extended, eliminate any fold.
In addition, Fig. 4 a shows further may the stage, wherein also extruding insulation band 2 in dipping process.
Also in this case, the metallic plate 6 via the every side against contact rod 1 realizes extruding.
In this case, after starting dipping, advantageously start extruding.
The inventive method achieves short dip time.In fact, due to by impregnated tape (comprising impregnating resin) with will be impregnated insulation tape wound to strike a bargain the layer replaced, so in dipping process, resin only needs the insulating tape flooding very limited thickness.
In addition, as everyone knows, in insulator 5, filler is usually also comprised to improve the electric of insulator 5 and/or heat conductivility.
In this respect, the impregnated tape 3 forming one or more dipping belt can comprise filler 7 (Fig. 7).
Known filler 7 can hinder dipping and make dipping slowly.
Advantageously, as explained, owing to will flood limited insulating tape thickness, institute in the method in accordance with the invention, will also achieve the situation wherein providing filler 7 to flood rapidly.
In addition, the path had to pass through due to impregnating resin is very little, so prevent filler to remove.
Naturally, described feature can provide independently of each other.
The dipping mica tape conceived in like fashion and method can carry out multiple improvement and change, and all improvement and change all fall in the scope of the present invention's conception; In addition, all details can be replaced by the element of technically equivalence.
In fact, can as required and technical merit choose at random used material and size.
Reference numeral
1 contact rod
2 insulating tapes
3 impregnated tapes
4 flexible containers
5 insulators
6 metallic plates
7 fillers
Claims (15)
1. one kind for realizing the method for contact rod (1) insulator (5) around, it comprises insulating tape (2) is wrapped this contact rod (1), be encapsulated in flexible container (4), apply vacuum, impregnating resin is utilized to flood this insulating tape (2), this impregnating resin is solidified, and this contact rod (1) of this insulator (5) had around it is removed from this flexible container (4), it is characterized in that, also the impregnated tape be made up of described impregnating resin (3) is wrapped this contact rod (1) together with this insulating tape (2), and in order to flood, this impregnated tape (3) is melted, the degree of overlapping of this impregnated tape (3) is selected thus according to required impregnating resin amount.
2. method according to claim 1, is characterized in that, makes this insulating tape (2) and this impregnated tape (3) be shaped before impregnation.
3. method according to claim 2, is characterized in that, realizes being shaped by extruding.
4. method according to claim 1, is characterized in that, when a vacuum is applied, reaches the pressure between 0.1-10mbar in this flexible container.
5. method according to claim 1, is characterized in that, extrudes this insulating tape (2) in dipping process.
6. method according to claim 5, is characterized in that, after dipping has started, the extruding in dipping process starts.
7. method according to claim 1, is characterized in that, in order to melt, this impregnated tape (3) is heated to the first temperature lower than curing temperature.
8. method according to claim 1, is characterized in that, will at least one deck impregnated tape (3) and at least one deck insulating tape (2) be alternately wrapped this contact rod (1).
9. method according to claim 8, is characterized in that, the internal layer directly contacted with this contact rod (1) is made up of this impregnated tape (3).
10. method according to claim 8, is characterized in that, skin is made up of insulating tape (2).
11. methods according to claim 1, is characterized in that, the impregnated tape of at least one dipping belt comprises filler (7).
12. methods according to claim 1, is characterized in that, this insulating tape (2) is the mica tape be made up of the mica paper being bonded to substrate layer.
13. methods according to claim 1, is characterized in that, this impregnated tape (3) comprises B rank impregnating resin.
14. methods according to claim 13, is characterized in that, this impregnated tape (3) comprises support material.
15. methods according to claim 3, is characterized in that, this contact rod (1) has multiple interweaving conductive wire harness.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP09180299.1A EP2339723B1 (en) | 2009-12-22 | 2009-12-22 | Method for realising insulation around a conductive bar |
| EP09180299.1 | 2009-12-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102185432A CN102185432A (en) | 2011-09-14 |
| CN102185432B true CN102185432B (en) | 2015-05-20 |
Family
ID=42124727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010625011.0A Expired - Fee Related CN102185432B (en) | 2009-12-22 | 2010-12-22 | Method for realizing insulation around a conductive bar |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US9032618B2 (en) |
| EP (1) | EP2339723B1 (en) |
| CN (1) | CN102185432B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2683064A1 (en) * | 2012-07-03 | 2014-01-08 | Alstom Technology Ltd. | Method for removing bars or coils from slots of an electric machine |
| US9508470B2 (en) | 2013-10-29 | 2016-11-29 | General Electric Company | Vibration damage repair in dynamoelectric machines |
| EP2860858A1 (en) * | 2014-04-10 | 2015-04-15 | Alstom Technology Ltd | Manufacturing method of a conductor bar |
| EP3419150B1 (en) | 2017-06-22 | 2020-02-19 | General Electric Company | Stator bar mold insert |
| JP7074659B2 (en) * | 2018-12-27 | 2022-05-24 | 三菱重工業株式会社 | How to repair the coil of a rotary electric machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1042628A (en) * | 1988-11-10 | 1990-05-30 | 亚瑞克·勃朗·勃威力有限公司 | High-voltage insulating system for electric machines |
| CN1227389A (en) * | 1998-02-27 | 1999-09-01 | 株式会社日立制作所 | Insulating material and windings thereby |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5430485A (en) * | 1977-08-10 | 1979-03-06 | Hitachi Ltd | Insulating treatment of electric conductor |
| JPS5850721A (en) * | 1981-09-21 | 1983-03-25 | Nitto Electric Ind Co Ltd | Impregnation fixing method for coil |
| JP2735434B2 (en) * | 1992-05-18 | 1998-04-02 | 株式会社日立製作所 | Electrical equipment |
| JP3653901B2 (en) * | 1996-12-10 | 2005-06-02 | 富士電機システムズ株式会社 | Rotator stator coil |
| US6288341B1 (en) * | 1998-02-27 | 2001-09-11 | Hitachi, Ltd. | Insulating material windings using same and a manufacturing method thereof |
| FR2776540B1 (en) * | 1998-03-27 | 2000-06-02 | Sidel Sa | BARRIER-EFFECT CONTAINER AND METHOD AND APPARATUS FOR ITS MANUFACTURING |
| DE19962290A1 (en) | 1999-12-23 | 2001-06-28 | Abb Patent Gmbh | Device for impregnating electrical machine winding rod insulation, has impregnation medium flowing into rod container at lower pressure than that in pressurized casing |
-
2009
- 2009-12-22 EP EP09180299.1A patent/EP2339723B1/en not_active Not-in-force
-
2010
- 2010-12-17 US US12/971,604 patent/US9032618B2/en not_active Expired - Fee Related
- 2010-12-22 CN CN201010625011.0A patent/CN102185432B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1042628A (en) * | 1988-11-10 | 1990-05-30 | 亚瑞克·勃朗·勃威力有限公司 | High-voltage insulating system for electric machines |
| CN1227389A (en) * | 1998-02-27 | 1999-09-01 | 株式会社日立制作所 | Insulating material and windings thereby |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2339723B1 (en) | 2014-08-27 |
| EP2339723A1 (en) | 2011-06-29 |
| US9032618B2 (en) | 2015-05-19 |
| US20110179643A1 (en) | 2011-07-28 |
| CN102185432A (en) | 2011-09-14 |
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| ASS | Succession or assignment of patent right |
Owner name: ALSTHOM RENEWABLE ENERGY TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: ALSTOM TECHNOLOGY LTD. Effective date: 20150305 |
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Effective date of registration: 20150305 Address after: Grenoble Applicant after: Alstom Renewable Technologies Address before: Baden, Switzerland Applicant before: Alstom Technology Ltd. |
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Address after: Grenoble Patentee after: Ge renewable energy technologies Address before: Grenoble Patentee before: Alstom Renewable Technologies |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20150520 Termination date: 20191222 |